Among the objectives of the ASGARD project we have:
- Development of a double-frequency (E1/E5a) shipborne multiconstellation Galileo OS & GPS shipborne receiver compliant with IMO resolutions MSC.401, MSC.432 and MSC.233, whose main points are:
- The design and integration of the shipborne receiver, using as a starting point the SAAB R5 Navigation System and GMV PRESENCE2 GNSS OEM receiver
- The main drivers of ASGARD shipborne receiver design will take benefit of Galileo OS features like improved performance or dual-frequency capabilities and also of Galileo OS-NMA to support resilient PNT . They are aligned with maritime standards and applicable EU regulation as well. Finally, they are compliant with IMO resolutions MSC.401, MSC.432 (Multi-system shipborne radionavigation receivers)
- Type approval for Galileo receiver following IEC standard 61108-3.
- Implementation of the algorithms to use the OS-NMA to support ResilientPNT in maritime navigation, following GSA specifications.
- By using reserved fields of the I/NAV, OS-NMA broadcast does not introduce extra overhead to the system. Standard OS receivers can ignore the dedicated NMA fields and keep functioning with the same level of performance (fully backwards compatibility).
- As showed in the figure below, an OS-NMA capable receiver differs from a generic OS receiver only by the additional firmware/software required to retrieve the OS-NMA related fields from the navigation message and to locally compute the MAC corresponding to a particular navigation message (using the information provided by the NMA field) to confirm whether this is authentic, matching in this case the broadcast one.
For more information see: User Consultation Platform 2020 (UCP)